I have a black miata that My wife got me for my birthday. The PO must have dry washed it and left bird droppings dry on it. It was full of scratches and had several etched places in the paint. I just finished applying 4 coats of Scratchx by hand. I then put a coat of Colorx on it. Looked good til the sun came out. I got approx 80% of the scratches out but the sun shows a ton of swirl marks. The boss said buy a PC7424 or I will never be happy with the finish. My question for you experts is what to order besides the pc. I need to know what type and size pads to order along with a backing plate. Also what products to use for the problems I have. If there is a specific kit to purchase that's fine. Please help an old fart out. Thanks for any suggestions